645132151 has 2 divisors, whose sum is σ = 645132152. Its totient is φ = 645132150.

The previous prime is 645132149. The next prime is 645132161. The reversal of 645132151 is 151231546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 645132151 - 2¹ = 645132149 is a prime.

Together with 645132149, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_33553261 and since 645132151 and 33553261 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (645132121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322566075 + 322566076.

It is an arithmetic number, because the mean of its divisors is an integer number (322566076).

Almost surely, 2^645132151 is an apocalyptic number.

645132151 is a deficient number, since it is larger than the sum of its proper divisors (1).

645132151 is an equidigital number, since it uses as much as digits as its factorization.

645132151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 645132151 is about 25399.4517854225. The cubic root of 645132151 is about 864.0712635371.

Adding to 645132151 its reverse (151231546), we get a palindrome (796363697).

The spelling of 645132151 in words is "six hundred forty-five million, one hundred thirty-two thousand, one hundred fifty-one".